Heat pump pressures 410a

pressure, the evaporating pressure and the spring pressure. When the expansion valve regulates, balance is created between bulb pressure on one side of the diaphragm and evaporating pressure plus spring force on the other side. The spring is used to set superheat. Features · Heat pump systems · Air conditioning units · Liquid coolers

410a ductless mini split operating pressures. I know that you should rarely put gauges on a ductless mini split, and that you should dump the charge and just weigh it in. I have heard that there are spec sheets that will give you "normal operating pressures" based on indoor and outdoor conditions. This would come in handy when servicing systems ...ProTerra ® Heat Pump Water Heaters; ... Protection Agency (EPA) will set a 750 global warming potential (GWP) limit for air conditioning. This means that R-410A, with a GWP of 2,088, will no longer be able to be used in new equipment. ... Extensive testing with A2Ls and numerous heat sources—including cigarettes, lighters, ...All vehicles use an oil pump to pump and pressurize engine oil. An oil pump ensures that oil stays moving and flowing throughout all parts of the engine during operation. A malfunc...410a ductless mini split operating pressures. I know that you should rarely put gauges on a ductless mini split, and that you should dump the charge and just weigh it in. I have heard that there are spec sheets that will give you "normal operating pressures" based on indoor and outdoor conditions. This would come in handy when servicing systems ...R−410A and R−22 air conditioner or heat pump. Model and serial numbers can be found on unit rating plate. Table 1—Air Conditioner and Heat Pump Model Number Nomenclature ... R−410A systems operate at higher pressures than standard R−22 systems. Do …work on 2 years old r410a heat pump,run in heat mode vapor line pressure 335 psig vapor line temp 80F,liquid line pressure 280psig,ture suction 98 psig,feel like the indoor txv check valve not open enough,switch out new txv,pressure both vapor and liquid only 2 psig different,and vapor line temp go up to 150F,pack u my stuff went home,5 hours later,customer call said not heating again,went ...

View and Download Daikin R-410A service manual online. Sky-Air Indoor. R-410A air ... Inverter Outdoor unit Cooling Only Heat Pump Indoor unit FCQ35B7V1 FCQ50B7V1 FCQ60B7V1 FFQ25B ... Air-Conditioner’s (Measured from 15 ~ 20 minutes or more after operation starts.) Operation Status and Pressure / Running Current When Cooling Air ...A two-stage heat pump has a compressor which is capable of operating at a high and low speed, improving its ability to maintain the temperature in a home with greater precision. Th...3. Vacuum pump with check valve. Specifications 2 Discharge speedzMaximum degree of vacuum 50 l/min (50Hz) Select a vacuum pump which is able to keep 60 l/min (60Hz) the vacuum degree of the system in excess of 2 Suction port UNF7/16-20 –14.6 psi (5 torr or 5000 micron or – 755 mmHg).Remove the cap to the low pressure line (Usually the only port). Check the gauges and be sure the valves are turned off (clockwise). Connect the gauges center yellow hose to the R410a refrigerant tank. Connect the adapter to the blue low pressure line on the gauges. As quickly as possible, attach the blue hose with the adapter to the mini split ...SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H) 421 08 9204 00 57. The windings of the indoor fan motor are open or the over heat protection has kicked in. Replace the fan motor or the defective part. The built−in heat protection of the motor kicks in frequently because the motor is abnormal.

R410a is a hydrofluorocarbon (HFC) refrigerant used in various air conditioning and refrigeration systems. This refrigerant is a combination of R32 and R125. It is seen as a more eco-friendly option compared to others, like R22. R410a has several advantages over other refrigerants. It is more efficient and can cool or heat a space more ...When the heat pump is running it blows semi-warm air like it is operating correctly but when I put my gauges on the system the high side pressure was 425 and low side was 395-400. Show More. ... will a standard heat pump replacement TXV valve (Danfoss TR6 410A) ... what should the high and low side pressures ge ...A heat pump is a device that uses work to transfer heat from a cool space to a warm space by transferring thermal energy using a refrigeration cycle, cooling the cool space and warming the warm space. [1] In cold weather, a heat pump can move heat from the cool outdoors to warm a house; the pump may also be designed to move heat from the house ...SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H) 421 08 9204 00 57. The windings of the indoor fan motor are open or the over heat protection has kicked in. Replace the fan motor or the defective part. The built−in heat protection of the motor kicks in frequently because the motor is abnormal.The maximum recommended temperature is often around 150 to 160 degrees Fahrenheit (65.6 to 71.1°C) for the condenser coil. What is normal subcooling for 410A? Normal subcooling for R-410A systems can range from 10 to 20 degrees Fahrenheit (5.6 to 11.1°C) depending on the specific system design and conditions.

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R-410A's higher operating pressures (60-70 percent higher than R-22) mean that contractors and techs are now using gauges designed for 410A. Refrigerant recovery equipment also must be designed for this refrigerant's pressures. R-410A will also produce refrigerant burns more quickly than R-22. Protective equipment is a vital part of safe work ...Water Source Heat Pump Axiom™ High Efficiency Vertical Stack — GET 0.75 to 3 Tons — 60 Hz Installation, Operation, and Maintenance March 2020 WSHP-SVX10G-EN SAFETY WARNING Only qualified personnel should install and service the eq uipment. The installation, starting up, and servicing ofGlobal heat pump sales grew by 15% in 2021. Europe has seen some of the quickest growth, with 35% sales growth in 2021, a trend that’s likely to continue because of the energy crisis. North ...Keep the vacuum pump running and the low side pressure at negative for about an hour. Once the pressure is stabilized, fully close the blue valve on the manifold gauge and turn off the vacuum pump. Hold the vacuum pressure for a few minutes to confirm if there is no leak and then proceed to the next step. 2.Jul 2, 2012 ... I just installed a new 410a Heat Pump package unit. The cooling side works fine (135 low, 375 high). The heat side starts, but the high ...In this HVAC Training Video, I show the R-22 and R-410A Range of Operating Pressures on Air Conditioning Systems! I show why we Measure Pressures and Tempera...

Pardo et al. [34] tested on an R-410A heat pump the refrigerants DR-5A and L41-2. Increments of 3–6% were found in terms of cooling capacity using DR-5A, while for the system operating with L41-2, the cooling capacity was reduced by 1–7%. Burns and Chen [21] evaluated drop-in tests on a split heat pump with five R-410A alternative …May 27, 2016 ... Comments1 ; Charging R-410A Refrigerant into an Air Conditioner! Pressures, Temps, Tips! AC Service Tech LLC · 1.2M views ; Charging a Heat Pump at ...What Should my AC Pressures Be for R410A Refrigerant - YouTube. Benjamin Sahlstrom. 426K subscribers. Subscribed. 6K. 397K views 4 years ago. Digital …Beginning in 2010, no residential air conditioning systems will be built with R-22. The leading replacement is R-410A. R-410A operates at pressures 50% greater than R-22, affecting product design and field installation practices. Welds on old refrigerant lines may not hold up to the increased pressures. R-22 uses mineral oil as a lubricant.R-410A refrigerant, and oversized heat exchangers combine to provide the user with exceptional energy savings. EW Series Hydronic Heat Pumps are safety listed with ETL. As a leader in the industry, WaterFurnace is dedicated to innovation, quality and customer satisfaction. In fact, every unitA Carrier 15 Seasonal Energy Efficiency Ratio heat pump has a higher energy efficiency rating than a Carrier 14 Seasonal Energy Efficiency Ratio heat pump. The heat pump with a hig...Heat Pump Pressure Switches. Updated: Apr 23, 2020. ... In one example of an R410A heat pump with a fan cycling switch installed, when the discharge pressure rises to 425psi, the fan will shut off and when the pressure …Suction Pressure/EVAP DTD Rule of Thumb Another common old-school rule of thumb is that suction pressure should be close to the outdoor temperature in an …R410A operates at a higher pressure than older refrigerants, which allows it to absorb and release more heat. This higher operating pressure contributes to its ...Let us begin with the function of the low-pressure switch in a heat pump. Low-pressure switches are usually installed close to the compressor on the suction side and are most commonly used as a protective cut ... At 60°C the refrigerant R134a will be at an overpressure of around 16 bar, R407C (dew point) at 24 bar and R410A at 37.5 ...The maximum recommended temperature is often around 150 to 160 degrees Fahrenheit (65.6 to 71.1°C) for the condenser coil. What is normal subcooling for 410A? Normal subcooling for R-410A systems can range from 10 to 20 degrees Fahrenheit (5.6 to 11.1°C) depending on the specific system design and conditions.

Rating plate charge is for systems with 15 ft. of line-set. Adjust charge 0.6 oz of refrigerant per foot of 3/8" liquid connecting tubing. Remove any refrigerant remaining in system before recharging if the system has lost complete charge, evacuate and recharge by weight. 338306-101 REV. Fig. 1 – PH16NA 2 -- 5 Tons.

Nov 2, 2003 · Recovery Of 410A Standard recovery procedures for R-410A remain unchanged. The only difference is the necessity to use a recovery machine and cylinders approved for the higher pressures of R-410A. Charging Since R-410A has a slight (0.3 degree) fractionation, it, like all other 400 series refrigerants, must be charged in the liquid state. When the heat pump is running it blows semi-warm air like it is operating correctly but when I put my gauges on the system the high side pressure was 425 and low side was 395-400. Show More. ... will a standard heat pump replacement TXV valve (Danfoss TR6 410A) ... what should the high and low side pressures ge ...As an HVAC technician or someone interested in air conditioning systems, understanding the key factors that impact 410A refrigerant pressures is crucial. The proper functioning of ...I am charging my heat pump it is an r410a and its about 90 degrees outside i have gotten the low side up from about 100psi to 130 and the high side from around 300psi to 340-50 is this about right what should my pressures be. The 410a part of the gauge is reading 44 low and 106 for high. In this video we go through the basics of checking a heat pump charge in heating. It can be tricky but its pretty simple if you do this..Title music:Music: B... 2362 posts · Joined 2009. #2 · Mar 21, 2012. 100 head= 37 degree saturation temp. 35 suction = a negative 11 saturation temp. Can't have sweat at 11 below zero F so my guess is it's not 410A in there. Kind of looks like pressure readings for 134a. Reclaim,leak check,vacuum to 500 microns then charge with fresh 410A. H.HeatWave SuperQuiet ® is the TOP selling and most sought after heat pump on the market.With a pure Titanium ThermoLink ® Heat Exchanger at its core – the HeatWave SuperQuiet ® Series offers you optimum return on your investment.. Making the right choice just got a whole lot easier. All of our HeatWave SuperQuiet ® Heat Pumps are fully …Eco-Safe R-410A Refrigerant & MrCool. August 10, 2016. By MR COOL. Eco-safe R-410A refrigerant is the new standard for American air conditioners and heat pumps. As you might expect, it’s also the main refrigerant we use here at MrCool. The government, of course, required companies like us to adopt refrigerants like R-410A, but do you know why?= Heat capacity at constant pressure in kJ/(kg)(°C) C v = Heat capacity at constant volume in kJ/(kg)(°C) v s = Velocity of sound in m/sec The gas constant, R = 8.314 J/(mole) (K) for Freon™ 410A, R = 0.11455 kJ/kg·K One atmosphere = 101.325 kPa Reference point for enthalpy and entropy: h f = 200 kJ/kg at 0 °C s f = 1 kJ/kg·K at 0 °C ...Pros & Cons of R410a refrigerant & What Makes it a Better Alternative to R22. R-410a is a refrigerant. Can be used in air conditioning systems, commercial refrigeration and heat pump equipment. It was developed as a replacement for R22. Was banned by the Montreal Protocol. Pros of R410a:

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Dec 3, 2018 · Adding Freon to heat pump during the heat mode, Carrier Unit, winter season maintenance, 2018 HVAC TECHNICIAN pressures and refrigeration capacity than R-22. The compositions of Freon™ 407C and Freon™ 410A are as follows: HFC-32 HFC-125 HFC-134a Freon™ 407C (R-407C), wt% 23 25 52 Freon™ 410A (R-410A), wt% 50 50 — Because Freon™ 407C and Freon™ 410A are mixtures of HFCs, they have zero ODP. Table 1 lists the chemical names and formulae … In this HVAC Training Video, I show the R-22 and R-410A Range of Operating Pressures on Air Conditioning Systems! I show why we Measure Pressures and Tempera... Always wear protective equipment, i.e. safety glasses or goggles and gloves, when working with any refrigerant. When charging or checking charge, always check for clean coils, clean filter (s), and proper air flow. Indoor air flow should be 350 to 450 CFM per ton of cooling, based on the size of the outdoor unit.The residential water well owner should set the pressure in a bladder tank at 2 pounds per square inch lower than the cut-on pressure for the well pump. A tire pressure gauge place...Suction Pressure/EVAP DTD Rule of Thumb Another common old-school rule of thumb is that suction pressure should be close to the outdoor temperature in an …psig °f psig °f psig °f psig °f psig °f 12; –37.7. 114Caution: R410a is not a direct replacement for R22. Only evaporators approved for use with R410a may be used with these heat pump units. Expansion valves and orifi ces must be calibrated and sized for use with R410a. If this heat pump is a replacement for a R22 system the evaporator and refrigerant line sets must be replaced or thoroughly cleanedAug 31, 2017 · The minimum, recommended low pressure cut-out switch settings for heat pumps application are 20 psig (1.4 bar) for R410A and 10 psig (0.7 bar) for R22, R407C and R134a. See AE4-1303 for more information. About Ferguson HVAC. Ferguson HVAC is a national distributor of residential and commercial heating and cooling equipment, parts and supplies. HVAC contractors across the country rely on us for the best unitary and ductless equipment brands and for a wide-range of HVAC products including accessories, controls, air distribution supplies, and …After evacuating the system for 2 hours, pressurize the system to 7.25psi (vacuum break) with nitrogen gas and evacuate the system again using the vacuum pump for 1 hour to …Jul 17, 2023 ... ... heat pump system. He goes over subcooling ... Charging R-410A Refrigerant into an Air Conditioner! Pressures, Temps, Tips! ... Charging a Heat Pump ... ….

I am wondering what the high and low pressures should be in a 3-ton 410a refrigerant AC system. ... I,m workin on a Trane heat pump system.ouydor mod.#4twxgo24b100aa w/ahu mod.# 4tee3f31a1000ab. the o.d. air temp was 83 deg. f. and would only cool down to 79 deg. f. indoors. unit had 356 psig. high ...What are the normal operating pressures for 410a high and low side in a 2 ton heat pump? 125 PSI for low and 365 PSI for high, the high can vary as the outdoor temperature does, basically on an 85 degree day you should see about 365. It can get up to 400 PSI on a 95 degree day.And 500 PSI on a 110 degree day.Jun 7, 2021 · Residential 410a system as follows: Liquid line: ~400psi. ~ 30 subcool. Vapor line: 105psi. ~30 superheat. The LLFD does not feel cold. The TXV is backed all the way out. Figure 1. Saturation pressures of R-410A, -22, and -134a for a range of temperatures in a/c applications. OPERATING PRESSURE POINTS. “Systems using R-410A operate at higher pressures [than R-22],” points out the Field Diagnostics team.R410A operates at a higher pressure than older refrigerants, which allows it to absorb and release more heat. This higher operating pressure contributes to its ...Daikin R-410A Service Manual. Vrv ii-sr-410a heat pump 50hz. Also See for R-410A: Service manual (381 pages) , Installation manual (177 pages) , Technical manual (44 pages) 1.This rule is totally a fluke and has no scientific basis other than it just generally tends to work out that way. On a properly functioning R-22 system running in heat mode in 40-degree weather, the suction …View and Download Daikin R-410A service manual online. Sky-Air Indoor. R-410A air ... Inverter Outdoor unit Cooling Only Heat Pump Indoor unit FCQ35B7V1 FCQ50B7V1 FCQ60B7V1 FFQ25B ... Air-Conditioner’s (Measured from 15 ~ 20 minutes or more after operation starts.) Operation Status and Pressure / Running Current When Cooling Air ...Pumps are devices used to move liquids like water and fuel. Hydraulic pumps use liquid to convert mechanical energy into pressure and flow. Here’s a brief look at how hydraulic pum... Heat pump pressures 410a, pressure, the evaporating pressure and the spring pressure. When the expansion valve regulates, balance is created between bulb pressure on one side of the diaphragm and evaporating pressure plus spring force on the other side. The spring is used to set superheat. Features · Heat pump systems · Air conditioning units · Liquid coolers, Freon™ 410A is a non-ozone depleting high efficiency hydrofluorocarbon (HFC) refrigerant. Freon™ 410A has higher cooling capacity and operating pressures than R-22 for new equipment specifically designed for R-410A. ASHRAE # R-410A Applications – New applications only • Residential and commercial air conditioning (AC) • Heat pumps ..., Turn the thermostat all the way up on the heat pump. These units are not compatible with 3 wire remotes. For 2 wire air switch installations remove the jumper between terminals 1 & 2 and replace it with the 2 wires from your switch. Set the thermostat on the heat pump to the desired temp. Wiring Diagram HPABG / HP380., R-410A HFC 72.6-61 691.8 158.3 34.5 67.74 0.261 116.8 0.3948 0.1953 0 2088 A1 0.2 Refrigerant Reference Guide 43 5th Edition 2010 R-410A Technical Guidelines Applications: Air conditioning equipment and heat pumps. Only for newly manufactured equipment, not for retrofitting R-22 systems, As an HVAC technician or someone interested in air conditioning systems, understanding the key factors that impact 410A refrigerant pressures is crucial. The proper functioning of ..., heat exchangers provide unparalleled efficiency. The coaxes are designed for low pressure drop and low flow rates. All coaxes are pressure rated to 450 psi water side and 600 psi on the refrigerant side. Optional ThermaShield coated water-to-refrigerant coaxial heat exchanger is available to prevent condensation in low temperature loop operation., Troubleshooting R-410A Systems. April 29, 2004. R-22 split system air conditioners and heat pumps are increasingly being retired (rather than repaired) as they near the end of their useful service lives. The most commonly used refrigerant in replacement air conditioners and heat pumps is R-410A. This month's Tech Tip offers an overview of some ..., Dec 3, 2018 · Adding Freon to heat pump during the heat mode, Carrier Unit, winter season maintenance, 2018 HVAC TECHNICIAN , Freon™ 410A is a non-ozone depleting high efficiency hydrofluorocarbon (HFC) refrigerant. Freon™ 410A has higher cooling capacity and operating pressures than R-22 for new equipment specifically designed for R-410A. ASHRAE # R-410A Applications – New applications only • Residential and commercial air conditioning (AC) • Heat pumps ..., Saturation Pressure-Temperature Data for R410A (psig)* Temp (°F) Pressure Temp (°C) Temp (°F) Pressure Temp (°C) Temp (°F) Temp (°C) Pressure Temp (°F ..., R-22 air conditioners use mineral oil and R-410A systems use synthetic oil. The synthetic oil is generally more soluble with R-410A than mineral oil is with R-22. This means the R-410A system operates more efficiently reducing wear and tear on the compressor. Dry Charging., R-410A split system air conditioner. Take a pressure measurement on the liquid line where the refrigerant exits the condenser coil. This is done with a manifold gauge set using the red, high pressure gauge and hose. There is typically a pressure port on the outdoor unit’s small liquid line service valve., system charge chart - refrigerant 410a pressure at suction service port (psig) connect pressure gauges to suction and liquid ports on unit. measure air temperature to outdoor coil. place an "x" on the appropriate chart where the suction and liquid pressures cross. if "x" is below ambient temperature line, add charge and repeat step 3., R-410A is a widely used refrigerant in air conditioning and heat pump systems. It is also known as AZ-20, EcoFluor R410, Forane 410A, Genetron R410A, Puron, and Suva 410A. It is part of the hydrofluorocarbon (HFC) class of refrigerants, and is composed of a mixture of R-32 and R-125., Mar 21, 2012 · 2362 posts · Joined 2009. #2 · Mar 21, 2012. 100 head= 37 degree saturation temp. 35 suction = a negative 11 saturation temp. Can't have sweat at 11 below zero F so my guess is it's not 410A in there. Kind of looks like pressure readings for 134a. Reclaim,leak check,vacuum to 500 microns then charge with fresh 410A. H. , About Ferguson HVAC. Ferguson HVAC is a national distributor of residential and commercial heating and cooling equipment, parts and supplies. HVAC contractors across the country rely on us for the best unitary and ductless equipment brands and for a wide-range of HVAC products including accessories, controls, air distribution supplies, and …, Beginning in 2010, no residential air conditioning systems will be built with R-22. The leading replacement is R-410A. R-410A operates at pressures 50% greater than R-22, affecting product design and field installation practices. Welds on old refrigerant lines may not hold up to the increased pressures. R-22 uses mineral oil as a lubricant., At Goodman, we believe in American dependability. Units are designed, engineered and assembled in the U.S.A. Find a Dealer. Product Reviews. Technical Specifications. Share. Learn more about the refreshingly affordable Goodman GSZ14 Heat Pump with up to 15 SEER / 9.0 HSPF efficiency., Eco-Safe R-410A Refrigerant & MrCool. August 10, 2016. By MR COOL. Eco-safe R-410A refrigerant is the new standard for American air conditioners and heat pumps. As you might expect, it’s also the main refrigerant we use here at MrCool. The government, of course, required companies like us to adopt refrigerants like R-410A, but do you know why?, In heat mode, the highest pressure an R410A mini split can even reach to around 500 psi. So, the pressure test of an R410A mini split should be around 500 psi with a maximum test pressure of 600 psi, subject to the …, R410A PRESSURE-TEMPERATURE CHART. Saturation Pressure-Temperature Data for R410A (psig)*. ECLPC-1 Rev 1 – 02/22. Created Date. 2/25/2022 1:24:53 PM., Our Rheem heat-pump is on the fritz. It keeps triggering the high-pressure cut-off on the outdoor unit. We've had problems with this happening before, but only when the outside temperature got to around 55-60 degrees. This time, it didn't even reach 50 degrees Fahrenheit outdoors all day long., Since R410A refrigerant is charged under higher pressure, charging an R22 system with it will increase the force within the coolant lines. The pressure can become high enough for parts of the system to rupture. At the very least, leaks will occur. Mixing refrigerants is not an option either. This will contaminate the system, and the R22 will ..., Turn the thermostat all the way up on the heat pump. These units are not compatible with 3 wire remotes. For 2 wire air switch installations remove the jumper between terminals 1 & 2 and replace it with the 2 wires from your switch. Set the thermostat on the heat pump to the desired temp. Wiring Diagram HPABG / HP380., Jan 7, 2019 · In heat mode, a dirty air filter causes low airflow across the condenser. This can cause extremely high head pressure. In heat mode, a dirty outdoor coil can cause a low suction pressure. As an example, Trane includes a pressure curve chart with many heat pump condensing units. Be sure to use the scale all the way to the right that says heat mode. , The main component of the experimental set-up is an air-to-water to water heat pump, which can work under the heating or cooling modes of operation. The refrigerant used is R410A. Figure 1 shows a schematic representation of the heat pump in the cooling mode of operation. The heat pump has a variable-speed scroll type compressor with vapor ..., Freon™ 410A is a non-ozone depleting high efficiency hydrofluorocarbon (HFC) refrigerant. Freon™ 410A has higher cooling capacity and operating pressures than R-22 for new equipment specifically designed for R-410A. ASHRAE # R-410A Applications – New applications only • Residential and commercial air conditioning (AC) • Heat pumps ..., R410A is a Hydrofluorocarbon (HFC ) Systems using R410A refrigerant run at a pressure of approximately 1.6 times that of similar systems using R22 and the energy efficiency is comparable. The R410A refrigerant is a 50:50 mixture of R32 and R125. Page 8 R410A in detail R410A is a Zeotropic blend of two refrigerants R32 50% R125 50% The phase ..., 3. Vacuum pump with check valve. Specifications 2 Discharge speedzMaximum degree of vacuum 50 l/min (50Hz) Select a vacuum pump which is able to keep 60 l/min (60Hz) the vacuum degree of the system in excess of 2 Suction port UNF7/16-20 –14.6 psi (5 torr or 5000 micron or – 755 mmHg)., 2362 posts · Joined 2009. #2 · Mar 21, 2012. 100 head= 37 degree saturation temp. 35 suction = a negative 11 saturation temp. Can't have sweat at 11 below zero F so my guess is it's not 410A in there. Kind of looks like pressure readings for 134a. Reclaim,leak check,vacuum to 500 microns then charge with fresh 410A. H., R-410A's higher operating pressures (60-70 percent higher than R-22) mean that contractors and techs are now using gauges designed for 410A. Refrigerant recovery equipment also must be designed for this refrigerant's pressures. R-410A will also produce refrigerant burns more quickly than R-22. Protective equipment is a vital part of safe work ..., R−410A systems operate at higher pressures than standard R−22 systems. Do not use R−22 service equipment or components on R−410A equipment. Ensure service equipment is rated for R −410A.! WARNING Refrigeration systems contain refrigerant under pressure. Extreme caution should be observed when handling refrigerants., psig °f psig °f psig °f psig °f psig °f 12; –37.7. 114